Set in the same space and time as the world of Star Wars, and due to hit your TV in 2014 (on both Disney Channel and Disney XD), the storyline for the crossover hour reads as follows:

The event episode’s story begins a long time ago, in a galaxy far, far away – in summer. Phineas and Ferb are living happily on Tatooine, just one moisture farm over from Luke Skywalker. They love simply hanging out and creating new adventures under the twin suns but find themselves thrust into a global rebellion when the plans for blowing up the Death Star accidentally fall into their hands.

Now that fate has suddenly pulled them into the fight for freedom, they must go in search of a pilot who can take them to the rebels so they can hand over the plans. Complicating matters, Candace has a Stormtrooper-like intent on “busting rebels” and chases Phineas and Ferb across the galaxy in hopes of retrieving the Death Star plans.

Meanwhile, back on the Death Star, Darth Enshmirtz, a low level Darth, has created a Force-powered “Sith-inator” that he plans to use against the Rebel Alliance. Agent P, working undercover for the Rebellion, is dispatched to stop him, but quickly gets trapped in carbonite. Then, things take a startling turn when Ferb is accidentally hit by the full blast of Dr. Darth Enschmirtz’s “inator” and becomes….an evil Sith.